Self-Employment Tax Calculator
Enter reseller net profit and any W-2 Social Security wages to estimate 2026 self-employment tax, Social Security tax, Medicare tax, and the deductible half.
$3,391.10
Social Security plus Medicare self-employment tax
$2,748.34
12.4% up to the remaining wage base
$642.76
2.9% on taxable SE earnings
$22,164.00
net profit multiplied by 92.35%
$1,695.55
above-the-line SE tax deduction
Taxable SE earnings are at least $400, so the estimate applies SE tax rates.
Trace net profit back to marketplace fee data
Self-employment tax starts from net profit, and seller net profit depends on the marketplace fees recorded before tax planning. Use the Fee Index for same-input marketplace rows, Fee Changes for recent policy updates, and Seller Reports for dated summaries of fee pressure.
Use this calculator for tax estimation, then use the data assets when you need a source for the marketplace fee assumptions that affect reseller net profit.
Turn this result into a listing decision
Use the tool result as a starting point, then test payout, break-even price, shipping, and marketplace fit before you publish the listing.
How this estimate works
The IRS generally applies self-employment tax to 92.35% of net self-employment earnings. The tax combines Social Security and Medicare: 12.4% Social Security up to the annual wage base and 2.9% Medicare with no wage base cap.
For 2026, the Social Security contribution and benefit base is $184,500. W-2 Social Security wages reduce how much self-employment income remains subject to the Social Security portion, but not the Medicare portion.
Source and limits
This page uses IRS self-employment tax guidance and the SSA 2026 contribution base. It does not calculate income tax, quarterly penalties, optional Schedule SE methods, or additional Medicare tax for high-income filers.
Check the IRS self-employment tax page and SSA contribution base table before filing.